Lowering-device regulator for sewer-pipe presses.



J. F. KEENAN.

LOWERING DEVICE REGULATOR FOR SEWER PIPE PRESSES.

APPLICATION FILED APB.30, 1913.

Patented June 16, 1914.

IN VENTOR.

A TTOR N E Y.

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UNITED STATES PATENT OFFICE.

JOHN F. KEENAN, OF TAYLOR, WASHINGTON, ASSIGNOR, TO DENNY-BENTON CLAYAND COAL 00., OF SEATTLE, WASHINGTON; A CORPORATION OF WASHINGTON.

LOWERING-DEVICE REGULATOR FOB SEWER PIPE PRESSES.

To all whom it may concern Be it known that 1, JOHN F. KEENAN, a citizenof the United States, residing at Taylor, in the county of King andState of Washington, have invented certain new and useful Improvementsin Lowering-Device Regulators for Sewer-Pipe Presses, of which thefollowing is a specification.

This invention relatesto the manufacture of sewer-pipe.

The object of the invention is the provision of improved devices whichare employed in regulating the action of the forming-board when loweringa pipe from the mold into position to be deposited upon a carriage forremoval to the pipe turning works.

The invention is illustrated in the accompanying drawings, wherein-Figure 1 is a view in vertical longitudinal section of my inventionapplied to pipelowering devices. Fig. 2 is a horizontal section through22 of Fig. 1. Fig. 3 is a transverse section through 3-3 of Figs. 1 and2.

'Referring to the drawings, the numeral 5 designates a mold disposed ata distance above the floor 6 of a factory and 7 is a forming-board, socalled, which is secured to the lower end of the mold when the pipe isbeing formed in the latter by means of lugs 35 provided on said board byhooks 8 depending from the mold. The formingboard'is supported upon theupper end of a piston-rod 9 of a cylinder 10 which is operated by afluid under pressure and con trolled by suitable valves (not shown) forregulating the raising and lowering of the forming-board.

In the process of manufacturing pipe a portion of a length is protrudedfrom the lower end of the mold upon the rccedence of the forming-boardwhile the plastic material within the mold is subjected to pressure. Thepressure acting on the material is then removed and the forming-board iswithdrawn from the pipe through the agency of the power cylinder 10 toallow of the insertion of a socket-board 11 into the hub of the pipe.-This'being accomplished, the forming-board is raised by the powercylinder against the underside of the socketboard and upon pressurebeing again applied to the material the pipe containing the socket-board1S lowered for a distance Specification of Letters Patent.

Application filed April 30, 1913.

Patented June 16, 1914.

Serial No. 764,544.

through the office of the cylinder. The corn joint downward movement ofthe forming board and pipe is then interrupted to enable the pipe to becut to length, whereupon the pipe is lowered by correspondingly lowerinthe forming-board until the socket-boar has been lowered into position,whereat the forwardly protruding prongs, such as 12, of bars 13 provideda on a carriage 14, are brought with the latter under the socketboard 11at diametrically opposite sides of the forming-board. When thuspresented the forming-board is further lowered to deposit thepipe-supporting socket-board upon the referred to carriage ron s. 'Theaforesaid devices are or may e 0 usual or suitable construction.

According to the present invention, I provide means whereby the downwardtravel of the forming-board is arrested to first maintain thesocket-board in position to have the carriage prongs introducedtherebelow and when this is accomplished to allow the forming-board tobe further lowered ndependently of the socket-board and the pipe whichare then borne by the carriageprongs. To such ends, I rigidly secure ata predetermined height on the piston-rod 9, the collar 15 of across-head. At each side are apertured blocks 16 which travel onguide-bars 17, Fig. 3. The blocks 16, as shown in the view, areintegrally connected with the collar 15 by arms 18.

19 represent companion or side members of a frame and are secured witheach other by interposed spacing-pieces 20 and bolts 21 and 22. The bolt21 which extends through corresponding ends of said side members ispivotally supported in bracket 23 and serves therewith as a hingesupport for the frame. Said frame is disposed so that piston-rod 9extends through the opening between said members, as best shown in Fig.2, and whereby the members are adapted to be encountered by thecrosshead arms 18 when the same is lowered with the piston-rod 't).

Under the free end of the frame I provide" therefor a tiltable prop.Said prop consists of an arm 25 havin'g axially alined trunnions 26 and27 extending from its ends and journaled in bearing boxes 28. An arm 29is rigidly connected to or formed with the trunnion 26 and is pivotallyconnected with an upright rod 30 having at its upper end a tread plate31. A lever 32 fulcrumed at 33 its upright position to retain the frameinv its elevated position 'to be engaged by the cross-head to' arrestthe iston-rod 9 in its downward travel when t e socket-board 11 islowered upon the forming-board into position to permittheflcarriagerongs being brought under the socket-board? When this isaccomplished, the operator presses down with his foot ,u on thetread-plate 31, resulting in the 0 30 pushing down the proparm 25,through the medium of arm 29, into the position in which it is indicatedby broken lines A in Fig. 1. The frame is thus lowered into dotted lineposition B whereupon the piston-rod '9 is unsu' ported and descends tolower the formingoard 7 into the broken line position C in the view. Bythus withdrawing the forming-board, the socket-board 11 and the supeosed pipe-P are deposited on the carriageare 13. The operator retainshis foot on the tread-plate until the i e is conveyed away upon thecarriage. pon releasing the tread-plate the weight 34 becomes operablesubsequent to the raising of the piston-rod to effect the uptilting ofthe prop-arm 25 which, in turn, tilts the frame into position to arrestthe piston-rod in the following downward movement of the same. What Iclaim, is

1. In devices of the character described, a piston-rod, power appliancesfor controlling the raislng and lowering ofthe pistonrod, an elementrigidly connected to said piston-rod, a frame, and tiltable prop devicesadapted to engage said element for stopping the downward movement of thepiston-rod and means for actuating said prop whereby a subsequentlowering of the piston rod may be effected.

2. The combination with a piston-rod adapted to raise and lower aforming-board of a pipe-molding machine, of means adapt, ed to interruptat a predetermined height the downward movement of the piston-rod,

means for automatically retaining the aforesaid means in operativeposition, and devices under the control of the operator for renderingthe second named means temporarily inoperative.

3. The combination with the hoisting and lowering devices of aforming-board for a pipe-molding machine a frame, a prop for said frame,means for maintaining said prop in position to hold the frame inposition to arrest said devices at a redetermined elevation, andfoot-actuated evicesaetin in opposition to said means whereby sai propis rendered inoperative to retain the frame in osition to stop saiddevices,

4. In evices of the class described, the combination with a pipe mold, asocketboard for a i pe, a carriage, a formingboard upon w 10h thesocket-board is supported when lowering a pipe thereupon from said mold,a power controlled pistonrod supporting the formin -board, positivemeans serving to arrest the ownward movement of the piston-rddwherebythe socketupon said carriage, and devices under the control ofthe operator whereby the aforeboard is stopped in position to bereceived said means are rendered temporarily inopv downward movements ofthe piston-rod and said boards to hold the socket-board in posi-- tionto be deposited upon said carria c, said devices being also adapted tobe in uenced by the operator to disengage the same from said element toallow the further lowering of the piston-rod to deposit the socket-boardon the carria e. V

Signed at cattle Wash., this 18th day oi April, 1913.

JOHN F. KEENAN.

Witnesses:

v Pmnnn BARNES,

E. Paraason.

